// JavaScript Document
totalPossibleRooms = 8;

function showRoom(rooms, Prefix) {
    roomsSelected = new Number(document.getElementById(rooms).value)-1; //make zero-based
    for (row = 0; row < totalPossibleRooms; row++) {
        if (row <= roomsSelected)
            eval("document.getElementById('" + Prefix + row + "').style.display = ''");
        else
            eval("document.getElementById('" + Prefix + row + "').style.display = 'none'");
    }
}